Entity Central Index Key Document and entity information. Document And Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Well Known Seasoned Issuer Entity Current Reporting Status Entity Current Reporting Status Entity Voluntary Filers Entity Voluntary Filers Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Entity Public Float Entity Public Float Income Statement [Abstract] Revenues Revenues Costs and Expenses: Costs And Expenses [Abstract] Cost of operations Cost Of Revenue Selling, general and administrative expenses Selling General And Administrative Expense Impairment loss (recovery) Restructuring Settlement And Impairment Provisions Loss (gains) on asset disposals Gain Loss On Disposition Of Assets Restructuring expenses Restructuring Charges Total costs and expenses Costs And Expenses Loss from Investments in Unconsolidated Affiliates Income Loss From Equity Method Investments Operating Income (Loss) Operating Income Loss Other Income (Expense): Nonoperating Income Expense [Abstract] Interest income (expense), net Interest Income Expense Nonoperating Net Gain (loss) on foreign currency, net Foreign Currency Transaction Gain Loss Before Tax Other income (expense), net Other Nonoperating Income Expense Total other income (expense) Nonoperating Income Expense Income (loss) before provision for income taxes and noncontrolling interests Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Provision for income taxes Income Tax Expense Benefit Net Loss Profit Loss Less: net income attributable to noncontrolling interest Net Income Loss Attributable To Noncontrolling Interest Net loss attributable to McDermott International, Inc. Net Income Loss Net loss attributable to McDermott International, Inc. Earnings Per Share Basic And Diluted [Abstract] Basic: Earnings Per Share Basic Diluted: Earnings Per Share Diluted Shares used in the computation of loss per share: Weighted Average Number Of Shares Outstanding Diluted Disclosure Items [Abstract] Basic: Weighted Average Number Of Shares Outstanding Basic Diluted: Weighted Average Number Of Diluted Shares Outstanding Statement Of Income And Comprehensive Income [Abstract] Net Loss Other comprehensive income (loss), net of tax: Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract] Unrealized gain on investments Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax Gain (loss) on derivatives Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax Foreign currency translation Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax Other comprehensive income (loss), net of tax Other Comprehensive Income Loss Net Of Tax Total Comprehensive Loss Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest Less: Comprehensive Income Attributable to Non-controlling Interests Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest Comprehensive Loss Attributable to McDermott International, Inc. Comprehensive Income Net Of Tax Statement Of Financial Position [Abstract] Assets Assets [Abstract] Current Assets: Assets Current [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Restricted cash and cash equivalents Restricted Cash And Cash Equivalents At Carrying Value Accounts receivable – trade, net Accounts Receivable Net Current Accounts receivable – other Other Receivables Net Current Contracts in progress Costs In Excess Of Billings On Uncompleted Contracts Or Programs Expected To Be Collected Within One Year Deferred income taxes Deferred Tax Assets Net Current Other current assets Other Assets Current Total Current Assets Assets Current Property, Plant and Equipment Property Plant And Equipment Gross Less accumulated depreciation Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Net Property, Plant and Equipment Property Plant And Equipment Net Accounts Receivable – Long-Term Retainages Contract Receivable Retainage Due After One Year Investments in Unconsolidated Affiliates Equity Method Investments Deferred Income Taxes Deferred Tax Assets Net Noncurrent Other Assets Other Assets Noncurrent Total Assets Assets Liabilities and Equity Liabilities And Stockholders Equity [Abstract] Current Liabilities: Liabilities Current [Abstract] Notes payable and current maturities of long-term debt Long Term Debt And Capital Lease Obligations Current Accounts payable Accounts Payable Current Accrued liabilities Accrued Liabilities Current Advance billings on contracts Billings In Excess Of Cost Current Deferred income taxes Deferred Tax Liabilities Gross Current Income taxes payable Accrued Income Taxes Current Total Current Liabilities Liabilities Current Long-Term Debt Long Term Debt And Capital Lease Obligations Self-Insurance Self Insurance Reserve Noncurrent Pension Liability Defined Benefit Pension Plan Liabilities Noncurrent Non-current Income Taxes Accrued Income Taxes Noncurrent Other Liabilities Other Liabilities Noncurrent Commitments and Contingencies Commitments And Contingencies Stockholders' Equity: Stockholders Equity Including Portion Attributable To Noncontrolling Interest [Abstract] Common stock, par value $1.00 per share, authorized 400,000,000 shares; issued 246,841,128 and 245,209,850 shares, respectively Common Stock Value Capital in excess of par value (including prepaid common stock purchase contracts) Additional Paid In Capital Common Stock Accumulated Deficit Retained Earnings Accumulated Deficit Treasury stock, at cost: 7,824,204 and 7,400,027 shares, respectively Treasury Stock Value Accumulated other comprehensive loss Accumulated Other Comprehensive Income Loss Net Of Tax Stockholders' Equity - McDermott International, Inc. Stockholders Equity Noncontrolling interest Minority Interest Total Equity Stockholders Equity Including Portion Attributable To Noncontrolling Interest Total Liabilities and Equity Liabilities And Stockholders Equity Common stock, par value Common Stock Par Or Stated Value Per Share Common stock, shares authorized Common Stock Shares Authorized Common stock, shares issued Common Stock Shares Issued Treasury stock, shares Treasury Stock Shares Non cash restructuring expense gain. Debt issuance cost amortization. Changes in contracts in progress and advance billings, net. Cash paid during period for. Supplemental disclosure of noncash investing activity. Non cash investment in unconsolidated affiliates. Supplemental disclosure of noncash financing activities. Non-cash acquisition of noncontrolling interest. Statement Of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided By Used In Operating Activities [Abstract] Non-cash items included in net loss: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Depreciation and amortization Depreciation And Amortization Drydock amortization Adjustment For Amortization Loss (gain) on asset impairments Stock-based compensation charges Share Based Compensation Loss from investments in unconsolidated affiliates Loss (gain) on foreign currency, net Foreign Currency Cash Flow Hedge Gain Loss Reclassified To Earnings Net Restructuring expense (gain) Non Cash Restructuring Expense Gain Deferred income taxes Deferred Income Tax Expense Benefit Pension expense Increase Decrease In Prepaid Pension Costs Debt issuance cost amortization Debt Issuance Cost Amortization Other non-cash items Other Noncash Income Expense Changes in assets and liabilities that provided (used) cash: Increase Decrease In Operating Capital [Abstract] Accounts receivable Increase Decrease In Accounts Receivable Contracts in progress net of advance billings on contracts Increase Decrease In Contracts In Progress And Advance Billings Contracts Accounts payable Increase Decrease In Accounts Payable Accrued and other current liabilities Increase Decrease In Accrued Liabilities And Other Operating Liabilities Pension liability Increase Decrease In Pension Plan Obligations Income taxes Increase Decrease In Accrued Income Taxes Payable Other assets and liabilities Increase Decrease In Other Operating Capital Net Total cash provided by (used in) operating activities Net Cash Provided By Used In Operating Activities Cash flows from investing activities: Net Cash Provided By Used In Investing Activities [Abstract] Purchases of property, plant and equipment Payments To Acquire Property Plant And Equipment (Increase) decrease in restricted cash and cash equivalents Increase Decrease In Restricted Cash Purchases of available-for-sale securities Payments To Acquire Available For Sale Securities Sales and maturities of available-for-sale securities Proceeds From Sale And Maturity Of Available For Sale Securities Investments in unconsolidated affiliates Payments To Acquire Interest In Subsidiaries And Affiliates Proceeds from asset dispositions Proceeds From Sale Of Property Plant And Equipment Other investing activities Payments For Proceeds From Other Investing Activities Total cash used in investing activities Net Cash Provided By Used In Investing Activities Cash flows from financing activities: Net Cash Provided By Used In Financing Activities [Abstract] Proceeds from debt Proceeds From Issuance Of Debt Repayment of debt Repayments Of Debt Issuance of common stock Proceeds From Issuance Of Common Stock Repurchase of common stock Payments For Repurchase Of Common Stock Payment of debt issuance costs Payments Of Debt Issuance Costs Distributions to noncontrolling interests Payments To Minority Shareholders Acquisition of noncontrolling interest Payments For Repurchase Of Redeemable Noncontrolling Interest Total cash provided by (used in) financing activities Net Cash Provided By Used In Financing Activities Effects of exchange rate changes on cash and cash equivalents Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations Net increase (decrease) in cash and cash equivalents Cash And Cash Equivalents Period Increase Decrease Cash and cash equivalents at beginning of year Cash and cash equivalents at end of year Supplemental Cash Flow Information: Supplemental Cash Flow Information [Abstract] Cash paid during the period for: Cash Paid During Period For [Abstract] Income taxes (net of refunds) Income Taxes Paid Net Cash paid for interest, net of amounts capitalized Interest Paid Net Supplemental Disclosure of Noncash Investing Activities: Supplemental Disclosure Of Noncash Investing Activity [Abstract] Non-cash investment in unconsolidated affiliates Non Cash Investment In Unconsolidated Affiliates Capital lease Capital Lease Obligations Incurred Supplemental Disclosure of Noncash Financing Activities: Supplemental Disclosure Of Noncash Financing Activities [Abstract] Non-cash acquisition of noncontrolling interest Non Cash Acquisition Of Noncontrolling Interest Adjustments to additional paid in capital common stock payable for prepaid service. Noncontrolling interest increase decrease from subsidiary equity issuance. Statement Of Stockholders Equity [Abstract] Statement [Table] Statement [Table] Statement Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Common Stock Par Value [Member] Common Stock [Member] Capital in Excess of Par Value [Member] Additional Paid In Capital [Member] Retained Earnings/(Accumulated Deficit) [Member] Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Other Comprehensive Income [Member] Treasury Stock [Member] Treasury Stock [Member] Stockholders' Equity [Member] Parent [Member] Noncontrolling Interest ("NCI") [Member] Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] Beginning Balance Net Income (loss) Other comprehensive loss, net of tax Common stock issued Stock Issued During Period Value New Issues Stock-based compensation charges Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Acquisition of NCI Minority Interest Decrease From Redemptions Issuance of tangible equity units Adjustments To Additional Paid In Capital Common Stock Payable For Prepaid Service Purchase of treasury shares Treasury Stock Value Acquired Cost Method Sales of subsidiary shares to NCI Noncontrolling Interest Increase Decrease From Subsidiary Equity Issuance Distributions to NCI Minority Interest Decrease From Distributions To Noncontrolling Interest Holders Share cancellation Stock Issued During Period Value Share Based Compensation Forfeited Other Stockholders Equity Other Ending Balance Accounting Policies [Abstract] BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES Basis Of Presentation And Significant Accounting Policies [Text Block] The entire disclosure for revenue recognition. Revenue Recognition [Abstract] REVENUE RECOGNITION Revenue Recognition Disclosure [Text Block] The entire disclosure for use of estimates. USE OF ESTIMATES Use Of Estimates Disclosure [Text Block] Restructuring And Related Activities [Abstract] RESTRUCTURING Restructuring And Related Activities Disclosure [Text Block] Receivables [Abstract] ACCOUNTS RECEIVABLE Financing Receivables [Text Block] Contractors [Abstract] CONTRACTS IN PROGRESS AND ADVANCE BILLINGS ON CONTRACTS Long Term Contracts Or Programs Disclosure [Text Block] Property Plant And Equipment [Abstract] PROPERTY, PLANT AND EQUIPMENT Property Plant And Equipment Disclosure [Text Block] Equity Method Investment Summarized Financial Information Equity [Abstract] EQUITY METHOD INVESTMENT Equity Method Investments Disclosure [Text Block] Debt Disclosure [Abstract] DEBT Debt Disclosure [Text Block] Compensation And Retirement Disclosure [Abstract] PENSION AND POSTRETIREMENT BENEFITS Pension And Other Postretirement Benefits Disclosure [Text Block] Derivative Instruments And Hedging Activities Disclosure [Abstract] DERIVATIVE FINANCIAL INSTRUMENTS Derivative Instruments And Hedging Activities Disclosure [Text Block] Fair Value Disclosures [Abstract] FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]